Question

which of the following is an example of a container filled with a pure substance rather than with a mixture? a balloon filled with helium. a tire filled with air. a glass filled with chocolate milk. a jar filled with salt water

Explanation:

To determine the container with a pure substance, we analyze each option:

• A balloon filled with helium: Helium is an element (a pure substance) as it consists of only helium atoms.
• A tire filled with air: Air is a mixture of gases (e.g., nitrogen, oxygen, etc.).
• A glass filled with chocolate milk: Chocolate milk is a mixture of milk, chocolate, and other components.
• A jar filled with salt water: Salt water is a mixture of salt (solute) and water (solvent).

So, the balloon with helium contains a pure substance.

Answer:

A. A balloon filled with helium.